Regulator for dynamo-electric machines



(No Model.) 2- Sheets-Sheet 1.

P.,P. BELT.

REGULATOR FOR DYNAMO ELECTRIC MACHINES. v No. 433,269. Patented July 29,1890.

WITNESSES: INVENTOR a b y (No Model.) 2 Sheets-Sheet 2. r P. P. BELT.REGULATOR FOR DYNAMO ELECTRIC MACHINES. 4 No. 433,269. Patgnted July 29,1890.

WITNESSES: INVENTOH:

i5- 17 a :By v d ATTORNEYS UNITED STATES PATENT OFF-ICE.

PERLEY P. BELT, OF

FRED ON IA, KANSAS.

REGULATOR FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 433,269, dated July 29,1890.

Application filed April 9, 1890.

To all whom it may concern.-

Be it known that I, PERLEY P. BELT, of Fredonia, in the county of Vilsonand State of Kansas, have invented a new and Improved Regulator forDynamo-Electric Machines, of which the following is a specification,reference being had to the annexed drawings, forming a part thereof, inwhich Figure 1 is a side elevation of a dynamo with my improvedregulator applied thereto. Fig. 2 is a longitudinal section of theregulator on an enlarged scale. Fig. 3 is a transverse section taken online 00 x in Fig. 2. Fig. 4 is a transverse section taken on line y y inFig. 2. Fig. 5 is a side elevation of the commutator-supporting sleeve.Fig. 6 is a side elevation of the piston of the rotary dashpot, showingthe inner surface of the cover; and Fig. 7 is a side elevation of thedash-pot, showing the abutments in full lines and the piston in dottedlines.

Similar letters of reference indicate corresponding parts in all theviews.

The object of my invention is to construct an automatic regulator fordynamo-electric machines, in which the current delivered by the machineis made to shift the commutatoreylinder on the armature-shaft, and thusvary the output of the machine.

My invention consists in the combination, with a dynamo-electricmachine, of a commutator cylinder mounted upon a sleeve placed on thearmature-shaft and adapted to move through a quarter of a revolution, a

pulley mounted upon the sleeve and con-' nected by a belt with anelectric motor in the main circuit of the dynamo, a spring connectedwith the armature-shaft and commutator-supporting sleeve, and arrangedto hold the commutator cylinderforward to the pointof maximum output, apair of brushes making contact with the commutator-eylinder, a rotarydash-pot carried bythe armature-shaft and having a piston connected withthe commutator-cylinder, and the electric connections between thecommutator-bars and sections of the armature, all as will be hereinaftermore fully described.

The dynamo A is of ordinary construction, except that its armature-shaftB is prolonged beyond the bearing a and made tubular to Serial No.$27,206. (He model.)

receive the wires leading from the sections of the armature 0. Upon thetubular armature shaft B is mounted a sleeve D, upon one end of which issecured the commutator-cylinder E. Upon the opposite end of the sleeveis $6- oured a'pulley F, and to this pulley is attached one end of avolute spring I), the opposite end of which is connected with thearmatureshaft 13. In the sleeve D,between the pulley F and thecommutator-cylinder E, is formed a transverse slot 0, which extendsthrough a distance about equal to one-quarter of the circumference ofthe sleeve. A screw (1 extends through the slot 0 and into thearmatureshaft B and serves to limit the movements of the sleeve D on thearmature-shaft. The spring I) is arranged to hold the commutatorcylinderE forward in the direct-ion in which it revolves.

The bars e of the commutator-cylinder E are connected with the sectionsof the armawires 9 extending through the tubular shaft B. The bearing aof the shaft B is prolonged outward, forming a sleeve h, upon which isplaced the yoke G, carrying the commutatorbrushes H, which bear upon thecommutatorcylinder E.

Upon the end of the tubular armature-shaft B issecured a rotary dash-potI formed of the cylinder 1', provided with the abutments j, thecentraily-apertured cap it, and the piston Z, provided with Wings m andmounted upon the shaft a, passing axially through the cylinder 2'. Tothe shaft 91 is secured a yoke 0, which is connected with thecommutatorcylinder E by rods 13.

On the top of the dyna-moA is mounted an electric motor J, having anarmature-shaft q, upon which is mounted a pulley r. The belt 3 passesaround the pulley r of the motor and around the pulley F on thearmature-shaft of the dynamo. The motor J is preferably provided withthe ordinary well-known Siemens H-armature. The said motor is connectedwith the dynamo, so that the current passing through it tends to revolvethe armature of the motor in a direction opposite to that in which it isrevolved by the belt 3. So long as the current in the outside circuit ofthe dynamo is normal the armature of the motor J ture O by the flexiblewire cords f and theis revolved through the belt 3, and thecommutator-cylinder E is held upon the armature-shaft to the positionfor the normal output of the current. NVhen the current in the externalcircuit increases, the strength of the field-magnet in the motor J isalso increased and a greater drag is produced upon the armature, therebyholding back the pulley F, sleeve D, and commutator-cylinder E inopposition to the force of the spring, thereby changing the position ofthe commutator-cylinder E relative to the position of the sections ofthe armature 0, thus diminishing the output of the current. Vhen thecurrent weakens in the external circuit, the power of the field-magnetof the motor over its armature is lessened, its drag upon the pulley Fand conimutator-cylinder E is reduced, and the spring Z) moves forwardthe comm utatorcylinder E toward the position of maximum output. Thedash-pot I upon the end of the armature-shaft being filled with someresisting medium-such as glycerine, alcohol, or even air-modifies themovements of the commutator-cylinder E and prevents vibrations andsudden changes in its position.

The form of the armature used in the motor J is such as to causeaslightly-uneven action, owing to the approaching and recedingmut-ator-cyli rider and arranged in the dynamocircuit, so as to tend torevolve by the current in a direction opposite to the rotary motionimparted to it by connection with the commutatoncylinder, substantiallyas specified.

2. In a regulator for dynamo-electric machines, the combination, with acommutatorcylinder movable on the armature-shaft and provided with aspring-connection with the armature-shaft, of an electric motorconnected mechanically with the commutator-cylinder and electricallywith the dynamo, so as to tend to turn the motor and commutator-cylinderin a direction opposite to that of the armatureshaft, substantially asspecified.

3. In a regulator for dynamo-electric machines, the combination, withthe commutatorcylinder provided with a spring-connection with thearmature-shaft, of a rotary dash-pot for modifying the movements of thecommutator-cylinder, substantially as specified.

at. In a regulator for dynamo-electric machines, the combination, withthe commutatorcylinder movable on the armature-shaft, of a motorconnected mechanically with the commutator-cylinder and electricallywith the dynamo and adapted to offer an irregular resistance to therotation of the commutatorcylinder, substantially as specified.

5. The combination of the dynamo A, provided with the tubulararmature-shaft B, the sleeve D, mounted upon the armature-shaft, thecommutator-cylinder E and pulley F, carried by the sleeve, the springI), the flexible connections f, the motor .I, and belt 8, substantiallyas specified.

PERLEY I. BELT.

Witnesses:

JoHN F. BROWN, J HOMAS J. lIUDsoN.

